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Tread with improved drainage space

A drainage volume, tread technology, applied in the direction of tire tread/tread pattern, tire parts, vehicle parts, etc.

Active Publication Date: 2013-10-30
OCIETE DE TECH MICHELIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Another problem commonly faced by tire manufacturers is that of maintaining tire performance throughout the working life of the tire, that is to say regardless of the degree of tread band wear

Method used

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  • Tread with improved drainage space
  • Tread with improved drainage space
  • Tread with improved drainage space

Examples

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Embodiment Construction

[0032] For ease of reading, the same reference number is used for all alternatives described below when the reference number indicates an element having the same structure and performing the same function.

[0033] figure 1 A partial view of a tread band 1 constructed according to the invention is shown. This tread 1 comprises a tread pattern formed by three main grooves 20 oriented circumferentially and delimiting intermediate ribs 22 and edge ribs located axially on each side of these intermediate ribs These grooves open to the tread surface 10 intended to come into contact with the road surface during running. The tread 1 described here corresponds to the tread in new, unworn condition. In this condition, all grooves have the same depth P20 and width L20, which is particularly useful for water present on the road surface in rainy conditions. It can also be seen in this first figure that there are circumferentially oriented channels 30 in the two intermediate ribs 22 ; mo...

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Abstract

Tyre tread band (1) having a tread surface (10) to come into contact with the road surface, this tread band comprising at least two wearing layers (C1, C2, C3) which are superposed in the thickness of the tread, this tread band (1) having a first wearing layer (C1) formed by a plurality of raised elements (21, 22) each comprising a contact surface, this first layer comprising at least grooves (20, 20′) of circumferential overall orientation, this first layer being intended to be in contact with the road surface when the tread is new, and at least one other wearing layer (C2, C3) coming into contact with the road surface after the first layer (C1) has entirely worn away, each other wearing layer comprising at least one channel (30) extending in the circumferential overall direction, each channel (30) opening onto the tread surface as soon as the said wearing layer is reached after the wearing layer that proceeds it has completely worn away, this tread band being such that each wearing layer (C2, C3), distinct from the first wearing layer (C1), comprises a plurality of transverse incisions (31) distributed in the circumferential direction, each transverse incision extending from a channel (30) of the layer in question in a direction which is not circumferential so as to open fully or partially into at least one other circumferentially oriented channel or groove, and do so irrespective of the level of wear of the said other wearing layer.

Description

technical field [0001] The present invention relates to the field of tire tread bands (tread compound or crown) and more particularly to tire tread bands for vehicles of the heavy goods type which have a geometry which varies with the degree of wear of the tread surface. The invention also relates to a mold for molding such a tread. Background technique [0002] The tire tread band extends circumferentially on the outside of the tire to provide contact between the tire and the road surface. Contact between the tire tread band and the road surface occurs in the contact impression. The role of the tread band is to provide enough grip to prevent the tires from slipping, which can occur when accelerating, braking or cornering. The tire tread band comprises raised elements such as ribs or blocks delimited by grooves, ie cuts with an average width exceeding 2 mm. Furthermore, these raised elements may be provided with sipes, ie cuts with a width equal to at most 2 mm. The eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60C11/11B60C11/04
CPCB60C11/12B60C11/0306B60C11/0323B60C11/04B60C11/032B60C11/125Y10S152/03Y10S152/901
Inventor J·巴罗A·普博
Owner OCIETE DE TECH MICHELIN
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